All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah. To proceed:
It is not correct to use the expression “Be Allah’s hand” for a created being, because “Allah’s Hand” is an established Attribute of Allah Almighty, and it is not correct to reinterpret it merely as power or mercy. As for saying, “Be Allah’s mercy to His creation,” this is permissible if what is intended is that the person should be a means through which Allah’s created mercy reaches His servants by means of kindness and compassion.
A created being should not be told: “Be Allah’s hand” or “Be Allah’s hand that bestows goodness,” because this expression may imply attributing an Attribute of Allah Almighty to a created being. It may also suggest that “Allah’s Hand” means power or strength.
This is incorrect, because Allah’s Hand is an established Attribute of His, in a manner befitting His Majesty. It is not His power, His favor, or merely His will.
Ahl al-Sunnah have affirmed the Attributes mentioned in the Qur’an and Sunnah according to their true meanings, without asking how and without likening them to the attributes of created beings.
Ibn ‘Abd al-Barr, may Allah have mercy on him, said:
“Ahl al-Sunnah unanimously affirm all the Attributes mentioned in the Qur’an and Sunnah, believe in them, and understand them according to their true meanings rather than metaphorically. However, they do not specify how any of them are, nor do they define them with a confined description.”
Therefore, it is not correct to say that “Allah’s Hand” in this expression means Allah’s power or mercy, because this diverts the wording from the meaning indicated by the texts and opens the door to unnecessary theological and linguistic problems.
It is preferable for someone who wishes to encourage good deeds to say, for example:
“Be a means of spreading goodness,” or “Be a support to those in need,” or “Let Allah bring goodness to His servants through your hands.”
These expressions are clearer and safer.
As for saying, “Be Allah’s mercy to His creation,” the matter is different, because mercy may refer to an Attribute of Allah Almighty, and it may also refer to the created mercy that Allah has placed among His servants.
It is authentically reported in Sahih Al-Bukhari from Abu Hurayrah, may Allah be pleased with him, that the Prophet ﷺ said:
“Indeed, when Allah created mercy, He created it as one hundred portions of mercy. He kept with Him ninety-nine portions and sent one portion of mercy among all His creation...”
Narrated by Al-Bukhari (6469).
And in Sahih Muslim:
“Indeed, Allah has one hundred portions of mercy. He sent down one portion of them among the jinn, humans, animals, and creatures, and by it they show affection and mercy to one another...”
Narrated by Muslim (2725).
Thus, mercy can be considered in two ways:
Accordingly, if a person is told, “Be Allah’s mercy to His creation,” and what is intended is: be a means through which the created mercy that Allah has placed among His servants reaches them—by showing mercy to those in need, helping those in distress, and doing good to people—then there appears to be no objection to this meaning.
Although the intended meaning of “Be Allah’s mercy to His creation” may be permissible, it is preferable to choose clear expressions that do not create confusion or suggest unintended meanings.
Instead of saying:
“Be Allah’s hand that bestows goodness,”
one may say:
“Be a means of bringing goodness to the servants of Allah.”
And instead of:
“Be Allah’s mercy to His creation,”
one may say:
“Be merciful to the servants of Allah and be a means through which His mercy and goodness reach them.”
This is clearer and further removed from ambiguity, especially in public posts read by people with different levels of knowledge and understanding.
It is not correct to say to a created being, “Be Allah’s hand,” because Allah’s Hand is an established Attribute of His, and it is not permissible to reinterpret it as power or mercy, nor to attribute Allah’s Attribute to a created being in this manner.
As for saying, “Be Allah’s mercy to His creation,” if what is intended is that the person should be a means through which created mercy reaches Allah’s servants by means of kindness, compassion, and fulfilling their needs, then there is no objection to its meaning.
Nevertheless, it is preferable to use clear and sound expressions that are free from ambiguity and to avoid wording that may cause confusion.
And Allah knows best.